Friday-Next Sunday, May 2-4: More than 1,000 sailors will compete on the Chesapeake Bay as the Sperry Top-Sider NOOD Regatta series stops at Annapolis Yacht Club. Top sailors from across the country will compete against local skippers for the overall prize of a trip to the British Virgin Islands to race in the Sperry Top-Sider NOOD Championship Regatta. Hours: 10 a.m.-4 p.m. May 2 and 3; 10 a.m.-2:30 p.m. May 4. Private boats for spectators are allowed. There is no charge to view the races. Information: 410-263-9279 and sailingworld.com/nood-regattas.

Thompson Run/Walk

Saturday, May 3: The third annual Adam Thompson 5K Run/Walk will begin at 8 a.m. at Harford Community College at 401 Thomas Run Road in Bel Air. The race honors the memory of Adam Thompson, a first-year HCC student who was killed in an automobile accident in 2011. Proceeds will benefit the Adam Thompson Memorial Nursing Scholarship at HCC and the Adam Thompson Memorial Education Scholarship at University of Maryland Upper Chesapeake Health. Online registration is available in advance at harford.edu/adam. For more information, call 443-412-2449. Donations are accepted at harford.edu/adam.

May 6: The Pro-Formance Fishing Team, a member of Maryland Bass Nation, is seeking additional members and will hold an introductory meeting 6 p.m. at Chevy's Restaurant in the Arundel Mills Mall. The club is based primarily in Glen Burnie and Annapolis but has membership throughout the state. PFT fishes 12 club tournaments a year and participates in MBN and other tournaments. It is accepting both boaters and riders. PFT welcomes new and experienced anglers. Send your questions to pftbass@yahoo.com or go to Pro-Formance Fishing Team on Facebook.

Endurance swim

May 10: TriColumbia will hold the inaugural Choptank Bridge Swim, a two-distance endurance open- water swim in the Choptank River, the largest river on the Delmarva Peninsula. The Cambridge event consists of a 1.6-mile swim and a 3.6-mile swim along the banks of the Choptank and between the Choptank River Bridge and the Choptank River Fishing Pier. Registration will be $60 until April 30, then $85 through May 9. Race-day registration, if still open, will be $85. For more information, go to TriColumbia.org or call 410-964-1246.

Crabbing update

May 13: Kelly Webb of the DNR Blue Crab Project will discussion regulation changes for the 2014 season at a 7:30 p.m. meeting of the Northwest Chapter of the Maryland Saltwater Sportfishing Association. The meeting is at the Patapsco Council No. 1960 Knights of Columbus Hall at 1010 Frederick Road, Catonsville. Use the Beaumont Avenue (side) entrance. Doors open at 6:45 p.m. Admission is free, and visitors are welcome. Information: Contact Mark DeHoff at mcdehoff@netzero.com.

Tour de Cure

May 17: The American Diabetes Association's Chesapeake Bay Tour de Cure has added individual and team time trials this year. Cycling options include 10, 31, 62, and 100 miles along scenic country roads, through farmland and small towns, along prominent waterscapes and aboard the Oxford Bellevue Ferry. Event and registration information: diabetes.org/chesapeaketourdecure.

Trail beautification

June 7: On National Trails Day, Parks & People will celebrate its 30th anniversary by cleaning and beautifying the Gwynns Falls Trail. Volunteers will clean the stream and improve riparian buffer with native plants in Winans Meadow (Trailhead 2 at 4500 Franklintown Road in Baltimore) from 9 a.m. until noon. RSVP by emailing info@parksandpeople.org or call Alex Krause at 410-448-5663.

Canoe N' Scoop

June 7: National Parks Conservation Association and Baltimore Parks & Recreation are hosting a Star-Spangled "Canoe N' Scoop" for National Trails Day from 9 a.m. until noon to help clean the shoreline at Middle Branch Park (3300 Waterview Ave. in Baltimore) along the Star-Spangled Banner Trail. To reserve a spot, email or call Ed Stierli at estierli@npca.org or 202-454-3339.

Paddleboard Fun Race

June 28: Paddle Second Chance will hold its second-annual Stand-Up Paddle day of fun racing and fundraising for Operation Second Chance, which serves wounded combat veterans and their families' recovery and transition back to active duty or into civilian life. The event will be at Holts Landing State Park in Millville, Del. For information, go to paddlesecondchance.com.

Obstacle-course race

July 19-20: BattleFrog, a new obstacle-course race series founded and designed by Navy SEALs, will stop at Crumland Farms in Frederick. Participants can choose between 15K, 5K and 1K courses, each of which is inspired by BUD/S (Basic Underwater Demolition/SEAL) Training, the six-month qualification course that all SEALs must undergo. Information: battlefrogseries.com.

Charles Street 12

Aug. 9: The point-to-point running race takes runners down Charles Street, now a National Scenic Byway, from the shops at Kenilworth in Towson to Power Plant Live in Baltimore. A portion of the proceeds will benefit the Children's Heart Program at the University of Maryland Children's Hospital. Register at charlesst12.com.